Jersey City Mayor Jerramiah Healy’s proposal to revise the city’s pay-to-play ordinance was advanced unanimously at last night’s council meeting, while a similar measure sponsored by his political rival was killed after a Healy ally changed her vote in the middle of the meeting.

The last-minute change of heart capped an otherwise uneventful meeting for the council, which had earlier in the night approved both Healy’s measure and the competing one, sponsored by Ward E Councilman Steve Fulop.

Ward F Councilwoman Michele Massey, a Healy ally who cast the deciding vote in favor of Fulop’s measure at about 6:30 p.m., told the council about two hours later that she wanted to change her vote to “no,” killing Fulop’s proposal for now.

Healy proposes expanding the 4-year-old pay-to-play law to restrict city vendors from contributing to Board of Education candidates. Fulop’s measure included that restriction, and added prohibitions on donations to state Senate and Assembly hopefuls.

After last night’s meeting, Massey said she has concerns that Fulop’s measure would not have been enforceable. The other council members who voted against Fulop’s plan were Peter Brennan, Bill Gaughan, Viola Richardson and Michael Sottolano.

Asked why she initially voted in favor of a proposal she opposes, Massey noted that she arrived late to the meeting, just as voting was underway.

“I rushed it,” she said. “I take full responsibility for not noting my particular agenda.”

Fulop called her a “rubber stamp” after she changed her vote, leading to a testy exchange between the two on the council dais.

“Do not insult me,” Massey told Fulop. “You are so rude.”

“The last couple of rubber stamps that were up here are no longer up here,” Fulop said, referring to two Healy allies who were voted off the council last November.

Fulop said he plans to re-introduce the measure in three weeks with some alterations.